Some of the more common Filter hooks are:

  • the_content: Applied to the content of the post or page before displaying.
  • the_content_rss: Applied to the content of post or page for RSS inclusion.
  • the_title: Applied to the post or page title before displaying.
  • comment_text: Applied to the comment text before displaying.
  • wp_title: Applied to the page <title> before displaying.
  • get_categories: Applied to the category list generated by get_categories.
  • the_permalink: Applied to the permalink URL.
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